Drilling, Stimulation, and Reservoir Assessment state of the art - - PowerPoint PPT Presentation

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Drilling, Stimulation, and Reservoir Assessment state of the art - - PowerPoint PPT Presentation

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Drilling, Stimulation, and Reservoir Assessment state of the art & challenges ahead SCHULTE Thomas, GeoForschungsZentrum Potsdam HUENGES Ernst, GeoForschungsZentrum Potsdam THORHALLSSON Sverrir, ISOR and: Abanes R., Asmundson R., Calore,

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SLIDE 1

Drilling, Stimulation, and Reservoir Assessment state of the art & challenges ahead

SCHULTE Thomas, GeoForschungsZentrum Potsdam HUENGES Ernst, GeoForschungsZentrum Potsdam THORHALLSSON Sverrir, ISOR

ENGINE FINAL CONFERENCE - VILNIUS 12-15 February 2008

Abanes R., Asmundson R., Calore, C., Fokker, P., Hopkirk, R.J., Montanari, D., Monterrosa, M., Muller, J., Nami, P., Portier, S., Rummel, F., Sanjuan, B, Schindler, M., Seiersten, M., Stamatakis, E., Tischner, S., Vuataz, F., Zimmermann, G. and:

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SLIDE 2

GOALS OF R&D ACTIVITIES RELIABLE TECHNOLOGY ECONOMIC VIABILITY

Drilling Pump Stimulation Planning Thermal circuit Other Energy conversion

  • Drilling
  • Stimulation
  • Reservoir

assessment

courtesy S. Frick Vilnius - February 13, 2008

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SLIDE 3

DRILLING STIMULATION RESERVOIR ASSESSMENT, MANAGEMENT & MONITORING SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

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SLIDE 4
  • DRILLING

STIMULATION RESERVOIR ASSESSMENT, MANAGEMENT & MONITORING SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

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SLIDE 5

Larderello & Philippines Iceland Soultz Gross Schönebeck Standardization Standardization Singular experiences Singular experiences mitigate formation damage mitigate formation damage Standardization Standardization General System State of the art gaps & needs DRILLING PROCEDURES

Vilnius - February 13, 2008

Drilling contracts with inceased risk sharing Flat spots in drilling curves

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SLIDE 6

0 15 30 45 60 75 90 1000 2000 3000 4000

One Rig – one geological system, improvement over 18 months 45% Drilling time reduction

Time drilled Depth DRILLED DEPTH VS TIME CURVES

Vilnius - February 13, 2008

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SLIDE 7

Larderello & Philippines Iceland Soultz Gross Schönebeck Standard HC tools Standard HC tools Standard HC tools Standard HC tools Intelligent tools for T > 150 °C Intelligent tools for T > 150 °C

  • Advanced core drilling

System State of the art gaps & needs DRILLING TOOLS

Vilnius - February 13, 2008

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SLIDE 8

Larderello & Philippines Iceland Soultz Gross Schönebeck Bentonite & additives Bentonite, water & air

  • nly

Natural salt & bentonite Bentonite & additives

  • Underbalanced drilling &

aerated muds

  • Aerated muds at large

diameters and angles System State of the art needs & gaps DRILLING MUD & CIRCULATION TECHNOLOGY

Vilnius - February 13, 2008

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SLIDE 9

Larderello & Philippines Iceland Soultz Gross Schönebeck Standardization & BH completion, full cementation Standardization & BH completion, full cementation Free floating casing Complete cementation

  • Standardization

Standardization General System State of the art needs & gaps DRILLING COMPLETION

Vilnius - February 13, 2008

Optimize ratio drilled diameter / flow diameter

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SLIDE 10

Vilnius - February 13, 2008

  • Reduce lost diameter in the well (small clearance)

DRILLING - CASING MATERIAL

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SLIDE 11
  • DRILLING

STIMULATION RESERVOIR ASSESSMENT, MANAGEMENT & MONITORING SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

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SLIDE 12

DRILLING

  • STIMULATION

RESERVOIR ASSESSMENT, MANAGEMENT & MONITORING SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

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SLIDE 13

Larderello & Philippines Iceland Soultz Gross Schönebeck Hydraulic stimulation, thermal frac & acid stimulation Hydraulic stimulation, thermal frac & acid stimulation

  • Hydraul. stimulation &

acid

  • Hydraul. stimulation &

acid

  • Investigate / improve

thermal stimulation Investigate thermal stimulation Optimize hydraulic stimulation in media with natural permeability System State of the art needs & gaps STIMULATION

Vilnius - February 13, 2008

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SLIDE 14

HYDRAULIC STIMULATION

Vilnius - February 13, 2008

  • Optimize well design and stimulation geometry
  • Improve stimulation procedures in rocks with natural permeability
  • Increase monitoring - build a knowledge base

courtesy A. Reinicke

  • Share experiences and improvements

courtesy Kwiatek et al. (2008)

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SLIDE 15

CHEMICAL STIMULATION

Vilnius - February 13, 2008

  • Uncertain rock mineralogy
  • Multiple types of coexisting formation damage
  • Address fast reaction kinetics at elevated temperatures
  • Investigate dissolution of secondary minerals

Courtesy: P. Rose

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SLIDE 16

STIMULATION THERMAL

Vilnius - February 13, 2008

  • Investigate potential of thermal fracturing
  • Applicable to systems with more moderate temperatures?

Courtesy: G. Axelsson & S. Thorhallsson

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SLIDE 17

DRILLING

  • STIMULATION

RESERVOIR ASSESSMENT, MANAGEMENT & MONITORING SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

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SLIDE 18

DRILLING STIMULATION

  • RESERVOIR ASSESSMENT, MANAGEMENT

& MONITORING SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

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SLIDE 19

Total Heat in Place Commercial Unrecovernable Sub-Commercial

Proven Probable Inferred

Reserves Resources

High Low Certainty Deliverability of Recoverable Energy

after Clothworthy et al., 2006 Vilnius - February 13, 2008

ASSESS GEOTHERMAL RESERVES

  • Work towards a standardized reserves valuation scheme
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SLIDE 20

Vilnius - February 13, 2008

Geysers Annual Steam Production, Water Injection and Seismicity 1158 26 26 12 200 400 600 800 1,000 1,200 1,400 1965 1970 1975 1980 1985 1990 1995 2000 2005 Annual Number of Seismic Events 50 100 150 200 250 300 350 Steam Production and Water Injection (billion lbs)

Seismic Events of M>=1.5 Earthquake Count M>=3.0 Earthquake M>=4.0 Steam Production Water Injection

RESERVOIR MANAGEMENT

  • Strategies to sustainably maximize production and mitigate

induced seismicity

  • Address issues of multiple users ulitizing the same resource

from Majer et al., 2007

  • Better understanding of how geothermal reservoirs change over time

Steam production water injection [billion lb] The Geysers, annual steam production, water injection and seismicity Annual number of seismic events

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SLIDE 21

Larderello & Philippines Iceland Soultz Gross Schönebeck Seismic, geochemical, thermal, pressure Seismic, geochemical, thermal, pressure Seismic, geochemical, thermal, pressure Seismic, geochemical, thermal, pressure Limited Number of parameters at HT Limited Number of parameters at HT Multi - parameter monitoring Multi - parameter monitoring System State of the art needs & gaps MONITORING

Vilnius - February 13, 2008

General Long term stable components Not allways common in commercial operations

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SLIDE 22

DRILLING STIMULATION

  • RESERVOIR ASSESSMENT, MANAGEMENT

& MONITORING SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

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SLIDE 23

DRILLING STIMULATION RESERVOIR ASSESSMENT, MANAGEMENT & MONITORING

  • SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

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SLIDE 24

Volcanics Singular experiences Monitoring tools Logging tools Tracer Drilling muds Cement System State of the art needs & gaps

Vilnius - February 13, 2008

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SLIDE 25

TECHNOLOGY TO REDUCE DRILLING COSTS TECHNOLOGY CONTRIBUTING TO INCREASE PRODUCTION OF A WELL TECHNOLGY WHICH MAKES GEOTHERMAL PROJECTS TECHNICALLY FEASIBLE , SAFE AND SUSTAINABLE. TECHNOLOGY NECESSARY FOR SUPERCRITICAL SYSTEMS

Vilnius - February 13, 2008

  • SUMMARY
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SLIDE 26

Thank you very much for your attention!

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SLIDE 27

Concept Site exploration Site development Production Abandonment

?

Site selected Feasibility of EGS at site demonstrated Installations and reservoir ready for production Production lifetime reached General planning and geological screening

  • conceptual
  • technical
  • political and

environmental

  • financial
  • Site screening
  • Pilot borehole
  • Stimulation tests
  • Production modelling
  • Inj./Prod boreholes
  • Intensive stimulation
  • Production tests
  • Surface installations
  • Power/Heat production
  • Maintenance

If no re-investment for this site: Deconstruction

Milestones

Investigation of UGR and EGS Drilling stimulation and reservoir assessment Exploitation, economic, environmental and social impacts

courtesy T. Kohl Vilnius - February 13, 2008